US8548139B2 - System and method for verifying a video call number entry in a directory - Google Patents

System and method for verifying a video call number entry in a directory Download PDF

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Publication number
US8548139B2
US8548139B2 US13/161,173 US201113161173A US8548139B2 US 8548139 B2 US8548139 B2 US 8548139B2 US 201113161173 A US201113161173 A US 201113161173A US 8548139 B2 US8548139 B2 US 8548139B2
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video call
video
registration challenge
call number
registration
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US20110310212A1 (en
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Axel Dahl
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Cisco Technology Inc
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Cisco Technology Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/35—Network arrangements, protocols or services for addressing or naming involving non-standard use of addresses for implementing network functionalities, e.g. coding subscription information within the address or functional addressing, i.e. assigning an address to a function
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/45—Network directories; Name-to-address mapping
    • H04L61/4535—Network directories; Name-to-address mapping using an address exchange platform which sets up a session between two nodes, e.g. rendezvous servers, session initiation protocols [SIP] registrars or H.323 gatekeepers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities

Definitions

  • the exemplary embodiments described herein relate to managing a directory of video call numbers, and in particular to a system and method of verifying a video call number entry in the directory.
  • IP Internet Protocol
  • IP-media calls in the following referred to as video calls, several different addressing or number schemes have been developed following the idea of telephone numbers, including but not limited to E.164 (network access number, telephone number, etc.), H.323 IDs (alphanumeric strings representing names, e-mail-like addresses, etc.), and any others defined in Recommendation H.225.0.
  • E.164 network access number, telephone number, etc.
  • H.323 IDs alphanumeric strings representing names, e-mail-like addresses, etc.
  • the video call numbers or video-URIs are unique within a Zone, Domain, among Zones, and among Domains.
  • IP setups support ways of mitigating the complexity of making an IP media calls, e.g. preconfigured address books on an endpoint let a user call an individual by selecting them from a list.
  • These solutions generally only work within an organization, since they rely on endpoints and servers having the information available to them already, as such they only allow individuals to call users whose details are already in the system.
  • Another possible solution would be to allow users, individuals and/or organizations, to register their video call numbers with a directory of video call numbers.
  • a directory of video call numbers For example, when allowing everyone to register video call numbers with the directory, there is a possibility that someone could register video call numbers that are not a valid address to a real video call endpoint.
  • ITSPs Internet Telephony Service Providers
  • a video call from a first video endpoint outside a ITSPs domain to a second video endpoint inside the ITSPs fails even though the second endpoint has a valid address inside the ITSPs domain.
  • addresses within an ITSP domain blocking outside video call requests should be considered invalid by a global directory.
  • An exemplary embodiment is a system including: a computer that is configured to be communicatively connected to a computer network, the computer including a client interface, an application unit and a video calling unit, wherein the computer is configured to provide a directory of video call numbers, the client interface is configured to receive a video call number for entry in the directory, and to submit the received video call number to the application unit to initiate verification of the video call number, receive a registration challenge response, and submit the received registration challenge response to the application unit, which is configured to validate the registration challenge response; the application unit is configured to receive the video call number from the client interface for verification, generate a registration challenge, store the registration challenge and the video call number in a session, submit the registration challenge and the video call number to the video calling unit, receive the registration challenge response from the client interface, load the registration challenge from the session, and upon finding a positive match between the registration challenge and the registration challenge response, updates the directory to indicate the video call number is valid; and the video calling unit is configured to receive the video call number and the registration challenge from the application unit, initiate
  • An exemplary method includes: receiving, at a computer, a video call number, wherein the computer includes a client interface connected to a computer network, an application unit, and a video calling unit, and the computer is configured to provide a directory of video call numbers; generating, by the application unit, a registration challenge; initiating, by the video calling unit, a video call session to the video call number; presenting a registration challenge over the video call session; receiving a registration challenge response entered using the client interface; and upon finding a positive match between the registration challenge and the registration challenge response, updating the directory indicating that the video call number is valid.
  • Another exemplary embodiment includes a non-transitory computer readable storage medium encoded with instructions, which when executed by a computer causes the computer to implement the above-noted method.
  • FIG. 1 illustrates an exemplary communication system
  • FIG. 2 is a flow chart showing an exemplary communication session
  • FIG. 3 is a flow chart showing an exemplary embodiment of the communication session of FIG. 2 .
  • FIG. 4 is an exemplary computer system.
  • An exemplary embodiment described herein pertains to a system and method for allowing users of video call endpoints to register their video call addresses in a local, regional and/or global directory, where the directory is embodied in a computer or server configured to validate whether the video call address is a valid accessible address and that the user registering the video call number actually has physical access to the video call device using the video call address.
  • FIG. 1 is a block diagram showing an exemplary communication system.
  • the exemplary system comprises a video call endpoint 1 , a personal computer (PC) 2 , a communication network 3 and a Directory server 4 (which may be embodied as, for example, a computer such as an MCU, gateway, or server), wherein the Directory server 4 further comprises a Client Interface 5 , an Application unit 6 (which may be executed by a processor in the directory server) and a Video calling unit 7 (which may be executed by a processor in the directory server).
  • the communication network 3 is typically a packet switched network employing the IP-protocol.
  • the PC 2 is typically employing the HTTP protocol over the communication network 3 when communicating with the Client interface 5 .
  • the Video calling unit 7 typically employs media call protocols such as H.323, SIP, Jingle etc.
  • the Video call endpoint 1 and the PC 2 for simplicity are shown as two separate units, both units could be incorporated within a single device where the Video call endpoint 1 and the PC 2 , are two different application using different application protocols.
  • the Directory server communicates with both the Video call endpoint 1 and the PC 2 over the same communication network, but it some situations where Quality Of Service is of high importance it might also be useful to use a separate communication network for the media calls.
  • the client interface 5 is typically in a HTML, Java, or similar web page format.
  • the client interface typically includes listings of video call numbers uploaded into the directory, search functions to find video call numbers in the directory and the possibility to upload video call numbers into the directory.
  • search functions to find video call numbers in the directory
  • the video call number will be tagged “Not verified”.
  • a “Verify Video call number” button is typically displayed next to each video call number tagged “Not verified”, where pressing the button initiates a verification process illustrated by FIG. 2 .
  • FIG. 2 An exemplary method of verifying a call number entry in a directory is shown in FIG. 2 .
  • the method begins in step 20 , wherein the client interface 5 receives a video call number for entry in the directory server 4 , and submits the video call number to the application unit 6 to initiate the verification of the video call number.
  • the step of transmitting the video call number to the application unit 6 could, for example, be initiated by pressing a “Verify Video call number” button as described above.
  • the application unit 6 When the application unit 6 receives the video call number from the client interface 5 , the application unit 6 generates a registration challenge (step 22 ).
  • the registration challenge is typically a sequence of alphanumeric letters, e.g. 12345, but could be any suitable registration challenge as disclosed below.
  • the application unit 6 in step 24 , then stores the registration challenge and the video call number in a session, and submits both the registration challenge and the video call number to the Video calling unit 7 .
  • the Video calling unit 7 in response receiving the registration challenge and the video call number, initiates a video call session to the video call number.
  • the video calling unit 7 is typically using one of SIP, H.323 and Jingle media call protocols to initiate the video call session. If the video call session fails, typically if the video calling unit is not receiving a response on a call request, e.g. a SIP INVITE message, an error message is returned to the application unit 6 .
  • the application unit 6 then preferably maintains the not verified status of the video call number entry. Alternatively, the status of the video call number entry could be changed to “Not Valid”. In yet another alternative, the call number entry may be deleted after failing a predefined number of verification attempts.
  • the video call unit 7 Upon successful initiation of the video call session the video call unit 7 , in step 28 , presents the registration challenge to the user over the video call session.
  • the registration challenge is preferably presented to the user visually, or visually and audibly. After the registration challenge is presented to the user the video call session is disconnected.
  • the user entering the registration challenge response, e.g. 12345, using the client interface 5 .
  • the client interface 5 submits the received registration challenge response and the video call number to the application unit 6 to validate the registration challenge response.
  • the application unit 6 Upon receiving the registration challenge response, the application unit 6 in step 32 , loads the registration challenge and the video call number saved previously for the same session. In step 34 , the application unit 6 compares the saved and entered video call numbers and registration challenge/registration challenge response respectively, and upon finding an exact match, step 36 , the application unit 6 updates the directory unit indicating the video call number is valid. If an exact match is not found, the application unit 6 preferably keeps the not verified status of the video call number entry. Alternatively, the status of the video call number entry could be changed to “Not Valid”. In yet another alternative, the call number entry may be deleted after failing a predefined number of verification attempts.
  • the registration challenge is a CAPCHTA (Completely Automated Public Turing test to tell Computers and Humans Apart) image.
  • CAPCHTA Completely Automated Public Turing test to tell Computers and Humans Apart
  • 3D CAPCHTA 3D CAPCHTA
  • Image based CAPCHTA the common text based CAPCHTA
  • the use of an alphanumeric CAPCHTA also allows the sequence to be presented audibly to a user having problems reading the distorted alphanumeric sequence.
  • FIG. 3 shows one exemplary embodiment of encoding a registration challenge to be presented over a video call session.
  • the Directory server 4 further comprises an encoding unit that is used in the process of FIG. 2 between the application unit 6 and the video calling unit 7 .
  • the encoding unit receives the registration challenge from the application unit 6 .
  • the registration challenge is an alphanumeric sequence generated by the application unit 6 .
  • the encoding unit Upon receiving the alphanumeric sequence the encoding unit generates a one image file based on the alphanumeric sequence using any image/CAPTCHA creating library, e.g. ImageMagik library or the ReCAPTCHA Api.
  • the encoding unit In step 25 B, the encoding unit generates a video sequence file by creating multiple copies of the image file and encoding the multiple copies of the image file into a video format. For example, if the video sequence file is encoded using a frame rate of 10 frames per second, and the registration challenge shall be presented for 60 seconds, then the encoding unit generates and encodes 600 images into a video format. This can easily be done using tools known to the person skilled in the art, such as ffmpeg tools.
  • the video format of the video sequence file is typically H.263 or H.264.
  • the video sequence file is then submitted to the Video calling unit 7 as disclosed above to be presented for a user over the video call session.
  • the encoding unit also comprises an audio encoder.
  • the alphanumeric sequence generated by the application unit 6 is also transmitted to the audio encoder, and in step 25 C, the alphanumeric sequence is entered into text-to-speech generator and converted into an audio sequence file.
  • the audio sequence file is then submitted to the Video calling unit 7 as disclosed above to be presented for a user over the video call session.
  • FIG. 4 illustrates a computer system (or server) 1201 upon which an embodiment of the directory server 4 may be implemented, or the hardware that may be included in PC 2 and/or video call endpoint 1 .
  • the hardware illustrated in FIG. 4 and described below may be used to generate the client interface, implement the application unit, implement the calling unit, to implement the encoding unit, and to implement the audio encoder.
  • the computer system 1201 includes a bus 1202 or other communication mechanism for communicating information, and a processor 1203 coupled with the bus 1202 for processing the information.
  • the computer system 1201 also includes a main memory 1204 , such as a random access memory (RAM) or other dynamic storage device (e.g., dynamic RAM (DRAM), static RAM (SRAM), and synchronous DRAM (SDRAM)), coupled to the bus 1202 for storing information and instructions to be executed by processor 1203 .
  • main memory 1204 may be used for storing temporary variables or other intermediate information during the execution of instructions by the processor 1203 .
  • the computer system 1201 further includes a read only memory (ROM) 1205 or other static storage device (e.g., programmable ROM (PROM), erasable PROM (EPROM), and electrically erasable PROM (EEPROM)) coupled to the bus 1202 for storing static information and instructions for the processor 1203 .
  • ROM read only memory
  • PROM programmable ROM
  • EPROM erasable PROM
  • EEPROM electrically erasable PROM
  • the computer system 1201 also includes a disk controller 1206 coupled to the bus 1202 to control one or more storage devices for storing information and instructions, such as a magnetic hard disk 1207 , and a removable media drive 1208 (e.g., floppy disk drive, read-only compact disc drive, read/write compact disc drive, compact disc jukebox, tape drive, and removable magneto-optical drive).
  • a removable media drive 1208 e.g., floppy disk drive, read-only compact disc drive, read/write compact disc drive, compact disc jukebox, tape drive, and removable magneto-optical drive.
  • the storage devices may be added to the computer system 1201 using an appropriate device interface (e.g., small computer system interface (SCSI), integrated device electronics (IDE), enhanced-IDE (E-IDE), direct memory access (DMA), or ultra-DMA).
  • SCSI small computer system interface
  • IDE integrated device electronics
  • E-IDE enhanced-IDE
  • DMA direct memory access
  • ultra-DMA ultra-DMA
  • the computer system 1201 may also include special purpose logic devices (e.g., application specific integrated circuits (ASICs)) or configurable logic devices (e.g., simple programmable logic devices (SPLDs), complex programmable logic devices (CPLDs), and field programmable gate arrays (FPGAs)).
  • ASICs application specific integrated circuits
  • SPLDs simple programmable logic devices
  • CPLDs complex programmable logic devices
  • FPGAs field programmable gate arrays
  • the computer system 1201 may also include a display controller 1209 coupled to the bus 1202 to control a display 1210 , such as a cathode ray tube (CRT), for displaying information to a computer user.
  • the computer system includes input devices, such as a keyboard 1211 and a pointing device 1212 , for interacting with a computer user and providing information to the processor 1203 .
  • the pointing device 1212 for example, may be a mouse, a trackball, or a pointing stick for communicating direction information and command selections to the processor 1203 and for controlling cursor movement on the display 1210 .
  • the computer system 1201 performs a portion or all of the processing steps in response to the processor 1203 executing one or more sequences of one or more instructions contained in a memory, such as the main memory 1204 .
  • a memory such as the main memory 1204 .
  • Such instructions may be read into the main memory 1204 from another non-transitory computer readable medium, such as a hard disk 1207 or a removable media drive 1208 .
  • processors in a multi-processing arrangement may also be employed to execute the sequences of instructions contained in main memory 1204 .
  • hard-wired circuitry may be used in place of or in combination with software instructions.
  • the computer system 1201 includes at least one non-transitory computer readable medium or memory for holding instructions programmed according to the teachings of the exemplary embodiments discussed herein and for containing data structures, tables, records, or other data described herein.
  • non-transitory computer readable media are compact discs, hard disks, floppy disks, tape, magneto-optical disks, PROMs (EPROM, EEPROM, flash EPROM), DRAM, SRAM, SDRAM, or any other magnetic medium, compact discs (e.g., CD-ROM), or any other optical medium.
  • exemplary embodiments include software for controlling the computer system 1201 , for driving a device or devices for implementing functionality discussed herein, and for enabling the computer system 1201 to interact with a human user.
  • software may include, but is not limited to, device drivers, operating systems, development tools, and applications software.
  • the computer system 1201 also includes a communication interface 1213 coupled to the bus 1202 .
  • the communication interface 1213 provides a two-way data communication coupling to a network link 1214 that is connected to, for example, a local area network (LAN) 1215 , or to another communications network 1216 such as the Internet.
  • LAN local area network
  • the communication interface 1213 may be a network interface card to attach to any packet switched LAN.
  • the communication interface 1213 may be an asymmetrical digital subscriber line (ADSL) card, an integrated services digital network (ISDN) card or a modem to provide a data communication connection to a corresponding type of communications line.
  • Wireless links may also be implemented.
  • the communication interface 1213 sends and receives electrical, electromagnetic or optical signals that carry digital data streams representing various types of information.
  • the network link 1214 typically provides data communication through one or more networks to other data devices.
  • the network link 1214 may provide a connection to another computer through a local network 1215 (e.g., a LAN) or through equipment operated by a service provider, which provides communication services through a communications network 1216 .
  • the local network 1214 and the communications network 1216 use, for example, electrical, electromagnetic, or optical signals that carry digital data streams, and the associated physical layer (e.g., CAT 5 cable, coaxial cable, optical fiber, etc).
  • the signals through the various networks and the signals on the network link 1214 and through the communication interface 1213 , which carry the digital data to and from the computer system 1201 maybe implemented in baseband signals, or carrier wave based signals.
  • the baseband signals convey the digital data as unmodulated electrical pulses that are descriptive of a stream of digital data bits, where the term “bits” is to be construed broadly to mean symbol, where each symbol conveys at least one or more information bits.
  • the digital data may also be used to modulate a carrier wave, such as with amplitude, phase and/or frequency shift keyed signals that are propagated over a conductive media, or transmitted as electromagnetic waves through a propagation medium.
  • the digital data may be sent as unmodulated baseband data through a “wired” communication channel and/or sent within a predetermined frequency band, different than baseband, by modulating a carrier wave.
  • the computer system 1201 can transmit and receive data, including program code, through the network(s) 1215 and 1216 , the network link 1214 and the communication interface 1213 .
  • the network link 1214 may provide a connection through a LAN 1215 to a mobile device 1217 such as a personal digital assistant (PDA) laptop computer, or cellular telephone.
  • PDA personal digital assistant

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Computer Security & Cryptography (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Telephonic Communication Services (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Stereo-Broadcasting Methods (AREA)
US13/161,173 2010-06-17 2011-06-15 System and method for verifying a video call number entry in a directory Active 2032-02-07 US8548139B2 (en)

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US20110064208A1 (en) * 2005-11-07 2011-03-17 ACK Ventures Holdings, LLC, a Delaware corporation Service Interfacing for Telephony
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US9025746B2 (en) 2012-07-03 2015-05-05 Avaya Inc. System and method for visual caller identification
US9693014B2 (en) 2013-12-30 2017-06-27 Alibaba Group Holdings Limited System and method for implementing video calls
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US10356073B2 (en) * 2016-08-29 2019-07-16 Cisco Technology, Inc. Secure captcha test

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US20110310212A1 (en) 2011-12-22
NO20100867A1 (no) 2011-12-19
EP2583482A1 (de) 2013-04-24
CN102948184A (zh) 2013-02-27
EP2583482A4 (de) 2013-11-27
EP2583482B1 (de) 2016-04-27
WO2011159164A1 (en) 2011-12-22
CN102948184B (zh) 2017-05-31

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